Located on the top floor (rooftop) of the Tango de Mayo Hotel--it's views can't be beat! Happy Hour…read morehas some solid 2 for 1 deals (at time of writing this, NOV 7, 2018--a variety of cocktails were priced for HH as 2 for $200ARS aka two for about $6USD). But also note HH is not daily, only Wednesday thru Saturdays. We didn't try any of the small plates offered, but they do apparently have food/munchies. The vibe is casual-chic (if that is in fact a thing, and not something I just made up lol) ie in no way pretentious and very much come as you are, but also has the vibe and music of a more trendy spot. But, also, again know that it's on the roof of a hotel, so there's not only a decent mix of younger locals, but also (what seems to be) older/foreign guests of the hotel. The servers/bartenders are attentive and friendly, and my boyfriend and I have enjoyed 2 (each) of the very best Aperol Spritz's we've ever had anywhere in the world (we can't decide if the the bartender is using a different ratio, or a special Prosecco or what, but they are TASTY!) all for a grand total of $400ARS aka 12 bucks US (what one single Spritz might cost me in my hometown of Philadelphia).
All in all the Happy Hour (or just the view) if you're in the area is worth checking out!